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Momentum of an object is the product of its mass and velocity (p=m x v). Since mass is a scalar quantity and velocity is a vector quantity, we can derive that momentum must therefore be a vector quantity ...

<p>There are two types of respiration that you need to know about - aerobic and anaerobic respiration. The main difference between the two types of respiration depend on whether oxygen is available ...

Phagocytosis begins when white cells called phagocytes recognise bacteria invading the body (pathogens). The cell membrane of one of these phagocytes then fuses around a single bacterium, engulfing it wit...

Firstly, the biological approach assumes that human behaviour can be explained in terms of genes, hormones, evolution and the nervous system hence there is a focus on nature rather than nurture. Secondly...

x^4 -8x^2 +15 = 0, we rewrite the equation in square form as (x^2-4)^2 -16 +15 =0 (x^2 -4)^2 = 1 x^2 -4 = ±1 so x^2 = 4±1, (x^2 = 3 or x^2 = 5) Therefore x = {-√3, √3, -√5, √5)